107 lines
3.2 KiB
Python
107 lines
3.2 KiB
Python
"""
|
|
Support for getting data from websites with scraping.
|
|
|
|
For more details about this platform, please refer to the documentation at
|
|
https://home-assistant.io/components/sensor.scrape/
|
|
"""
|
|
import logging
|
|
|
|
import voluptuous as vol
|
|
|
|
from homeassistant.components.sensor import PLATFORM_SCHEMA
|
|
from homeassistant.components.sensor.rest import RestData
|
|
from homeassistant.const import (
|
|
CONF_NAME, CONF_RESOURCE, CONF_UNIT_OF_MEASUREMENT, STATE_UNKNOWN,
|
|
CONF_VALUE_TEMPLATE, CONF_VERIFY_SSL)
|
|
from homeassistant.helpers.entity import Entity
|
|
import homeassistant.helpers.config_validation as cv
|
|
|
|
REQUIREMENTS = ['beautifulsoup4==4.5.3']
|
|
|
|
_LOGGER = logging.getLogger(__name__)
|
|
|
|
CONF_SELECT = 'select'
|
|
|
|
DEFAULT_NAME = 'Web scrape'
|
|
DEFAULT_VERIFY_SSL = True
|
|
|
|
PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
|
|
vol.Required(CONF_RESOURCE): cv.string,
|
|
vol.Required(CONF_SELECT): cv.string,
|
|
vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
|
|
vol.Optional(CONF_UNIT_OF_MEASUREMENT): cv.string,
|
|
vol.Optional(CONF_VALUE_TEMPLATE): cv.template,
|
|
vol.Optional(CONF_VERIFY_SSL, default=DEFAULT_VERIFY_SSL): cv.boolean,
|
|
})
|
|
|
|
|
|
def setup_platform(hass, config, add_devices, discovery_info=None):
|
|
"""Set up the Web scrape sensor."""
|
|
name = config.get(CONF_NAME)
|
|
resource = config.get(CONF_RESOURCE)
|
|
method = 'GET'
|
|
payload = auth = headers = None
|
|
verify_ssl = config.get(CONF_VERIFY_SSL)
|
|
select = config.get(CONF_SELECT)
|
|
unit = config.get(CONF_UNIT_OF_MEASUREMENT)
|
|
value_template = config.get(CONF_VALUE_TEMPLATE)
|
|
if value_template is not None:
|
|
value_template.hass = hass
|
|
|
|
rest = RestData(method, resource, auth, headers, payload, verify_ssl)
|
|
rest.update()
|
|
|
|
if rest.data is None:
|
|
_LOGGER.error("Unable to fetch data from %s", resource)
|
|
return False
|
|
|
|
add_devices([
|
|
ScrapeSensor(hass, rest, name, select, value_template, unit)
|
|
])
|
|
|
|
|
|
class ScrapeSensor(Entity):
|
|
"""Representation of a web scrape sensor."""
|
|
|
|
def __init__(self, hass, rest, name, select, value_template, unit):
|
|
"""Initialize a web scrape sensor."""
|
|
self.rest = rest
|
|
self._name = name
|
|
self._state = STATE_UNKNOWN
|
|
self._select = select
|
|
self._value_template = value_template
|
|
self._unit_of_measurement = unit
|
|
self.update()
|
|
|
|
@property
|
|
def name(self):
|
|
"""Return the name of the sensor."""
|
|
return self._name
|
|
|
|
@property
|
|
def unit_of_measurement(self):
|
|
"""Return the unit the value is expressed in."""
|
|
return self._unit_of_measurement
|
|
|
|
@property
|
|
def state(self):
|
|
"""Return the state of the device."""
|
|
return self._state
|
|
|
|
def update(self):
|
|
"""Get the latest data from the source and updates the state."""
|
|
self.rest.update()
|
|
|
|
from bs4 import BeautifulSoup
|
|
|
|
raw_data = BeautifulSoup(self.rest.data, 'html.parser')
|
|
_LOGGER.debug(raw_data)
|
|
value = raw_data.select(self._select)[0].text
|
|
_LOGGER.debug(value)
|
|
|
|
if self._value_template is not None:
|
|
self._state = self._value_template.render_with_possible_json_value(
|
|
value, STATE_UNKNOWN)
|
|
else:
|
|
self._state = value
|